A Wichita baby who suffered multiple fractures in a possible child abuse case was doing well enough to be released from a hospital, an official said Tuesday.

Although the 4 1/2-month-old boy suffered fractures to his arms, legs and ribs, further medical examination determined that he doesn’t have skull fractures as originally thought, said sheriff’s Sgt. Kevin Bradford, with the Wichita-Sedgwick County Exploited and Missing Child Unit. The injuries don’t appear to be caused by shaking the baby, Bradford said.

The baby was expected to be released from the hospital some time Tuesday but will be in protective custody until the investigation is completed, he said.

Investigators plan to present their findings to prosecutors on Wednesday morning. On Saturday, authorities arrested a 20-year-old man, described as a “father figure” in the baby’s home, on suspicion of aggravated battery related to the baby’s injuries. The man remained in jail Tuesday under a $25,000 bond.

The case unfolded Friday after the baby’s mother took him to a doctor’s office, where “they were concerned about the injuries because they weren’t consistent with what she was saying to them,” Bradford said Monday.

The mother didn’t appear to be aware of the severity of the child’s injuries until she took her son to the doctor’s office, he said. The baby was taken by ambulance from the doctor’s office to Via Christi Hospital St. Francis.